B4X

Send StringBuilder Contents over a Socket

Demonstrates Socket.SendSb, which encodes the contents of a StringBuilder using StringCharset and sends the resulting bytes.

Background. Text send and receive operations encode and decode bytes using the StringCharset property. For plain ASCII or UTF-8 protocols, setting StringCharset to utf-8 is a safe default.

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B4X

Dim success As Boolean = False

Dim socket As ChilkatSocket
socket.Initialize("socket")

'  Connect to the server using TLS.  The 3rd argument enables the TLS handshake after the TCP
'  connection succeeds; the 4th is the maximum time to wait, in milliseconds.
Dim bTls As Boolean = True
Dim maxWaitMs As Int = 5000
success = socket.Connect("example.com", 5000, bTls, maxWaitMs)
If success = False Then
    Log(socket.LastErrorText)
    Return
End If


'  StringCharset controls the character encoding used when sending and receiving text.
socket.StringCharset = "utf-8"

'  Build the text to send in a StringBuilder, then send its contents.
Dim sb As ChilkatStringBuilder
sb.Initialize
sb.Append("SET temperature 21" & Chr(13) & Chr(10))

success = socket.SendSb(sb)
If success = False Then
    Log(socket.LastErrorText)
    Return
End If

Log("Message sent.")